From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5462C2B5C0 for ; Tue, 24 Oct 2023 13:46:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--surenb.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="dISgpoBC" Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-da03390793fso1012316276.3 for ; Tue, 24 Oct 2023 06:46:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1698155206; x=1698760006; darn=lists.linux.dev; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=fObhDXE+DfK48fbfXMStFHtHAmn90M4M91A2l4CxzLM=; b=dISgpoBCqZ/Y8A/MF/yZJzKqIws78gQA2htGGxpagmouk0Hl9O69sLMNEtdxV4fe29 6b7nEhx5Adi6In5oAWe/Aymc7Zp2qQx3ymz5eJdfpERwH4mujvixhRv5/svPrhUu4Gmp 8owKJojw3EYJQT0WDABA0uMIcxOrcUNIeB1UCjGRD+5TEDDffrpU8TrvMgTSbwaBRHAS lbm2Sn9bBarLcADUafVNO14RoNIY0gZxn82iu9hjwjcv9eWSH/+5eU6d0W+1QkX9T+4Y xIAFU1PoOwyWFhji3simAY3wmSv9IO3OiCncVBaxUtG3bLxYaGsTIAZ5xm/HF0/I2zBK tcJg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698155206; x=1698760006; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=fObhDXE+DfK48fbfXMStFHtHAmn90M4M91A2l4CxzLM=; b=atdS3QYCvtysRMFHJJYfqNk45XaAIhqYihRZkQQN5Qvn6rDK15jJEkXoDiWQkarqTK yHjykXKpP9BT1NME7j3myCRFubejM16gyY+zy6oSE+64xoLlMTlC5PUwwK3rxsBX0mOp mnuXVNtqQgr1lvDAlaV8REDL/PmTigYP6fePYI2CXqNl9T4BQFVkylPra/0nFlWOTCWb 3QX6DLUR1+qOSnmiRJZPHr/mHRO/zsMlHUIYJD0GWEC3Yt8d9I4JUt9Fi1dd9Uo/wY/S FDTtYw8eGNgKlAJrHklzMtQluA4zO9ayPDO4ylkrRfow4M7dAqZTvriie21K5pjGAi3/ IGTg== X-Gm-Message-State: AOJu0YwcJ+vCDtiQPpQjh40CRCgYV4FSvatM1H7k1SnDDcfqY28UepN8 WYO9MkZTNS1xXPj0Hsw6ZkV/e6fLsaY= X-Google-Smtp-Source: AGHT+IGzqDmmVKWAX0qOLCG4zSSOu2XUUgzUKaIXDvA8+3j+t9o+p5RCbsfa+aQ1r6gMSAIrcYIsUr6/0f0= X-Received: from surenb-desktop.mtv.corp.google.com ([2620:15c:211:201:45ba:3318:d7a5:336a]) (user=surenb job=sendgmr) by 2002:a25:5008:0:b0:da0:2b01:7215 with SMTP id e8-20020a255008000000b00da02b017215mr55818ybb.10.1698155205957; Tue, 24 Oct 2023 06:46:45 -0700 (PDT) Date: Tue, 24 Oct 2023 06:45:59 -0700 In-Reply-To: <20231024134637.3120277-1-surenb@google.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20231024134637.3120277-1-surenb@google.com> X-Mailer: git-send-email 2.42.0.758.gaed0368e0e-goog Message-ID: <20231024134637.3120277-3-surenb@google.com> Subject: [PATCH v2 02/39] scripts/kallysms: Always include __start and __stop symbols From: Suren Baghdasaryan To: akpm@linux-foundation.org Cc: kent.overstreet@linux.dev, mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org, roman.gushchin@linux.dev, mgorman@suse.de, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, corbet@lwn.net, void@manifault.com, peterz@infradead.org, juri.lelli@redhat.com, ldufour@linux.ibm.com, catalin.marinas@arm.com, will@kernel.org, arnd@arndb.de, tglx@linutronix.de, mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org, peterx@redhat.com, david@redhat.com, axboe@kernel.dk, mcgrof@kernel.org, masahiroy@kernel.org, nathan@kernel.org, dennis@kernel.org, tj@kernel.org, muchun.song@linux.dev, rppt@kernel.org, paulmck@kernel.org, pasha.tatashin@soleen.com, yosryahmed@google.com, yuzhao@google.com, dhowells@redhat.com, hughd@google.com, andreyknvl@gmail.com, keescook@chromium.org, ndesaulniers@google.com, vvvvvv@google.com, gregkh@linuxfoundation.org, ebiggers@google.com, ytcoode@gmail.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, bristot@redhat.com, vschneid@redhat.com, cl@linux.com, penberg@kernel.org, iamjoonsoo.kim@lge.com, 42.hyeyoo@gmail.com, glider@google.com, elver@google.com, dvyukov@google.com, shakeelb@google.com, songmuchun@bytedance.com, jbaron@akamai.com, rientjes@google.com, minchan@google.com, kaleshsingh@google.com, surenb@google.com, kernel-team@android.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, kasan-dev@googlegroups.com, cgroups@vger.kernel.org Content-Type: text/plain; charset="UTF-8" From: Kent Overstreet These symbols are used to denote section boundaries: by always including them we can unify loading sections from modules with loading built-in sections, which leads to some significant cleanup. Signed-off-by: Kent Overstreet Signed-off-by: Suren Baghdasaryan --- scripts/kallsyms.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c index 653b92f6d4c8..47978efe4797 100644 --- a/scripts/kallsyms.c +++ b/scripts/kallsyms.c @@ -204,6 +204,11 @@ static int symbol_in_range(const struct sym_entry *s, return 0; } +static bool string_starts_with(const char *s, const char *prefix) +{ + return strncmp(s, prefix, strlen(prefix)) == 0; +} + static int symbol_valid(const struct sym_entry *s) { const char *name = sym_name(s); @@ -211,6 +216,14 @@ static int symbol_valid(const struct sym_entry *s) /* if --all-symbols is not specified, then symbols outside the text * and inittext sections are discarded */ if (!all_symbols) { + /* + * Symbols starting with __start and __stop are used to denote + * section boundaries, and should always be included: + */ + if (string_starts_with(name, "__start_") || + string_starts_with(name, "__stop_")) + return 1; + if (symbol_in_range(s, text_ranges, ARRAY_SIZE(text_ranges)) == 0) return 0; -- 2.42.0.758.gaed0368e0e-goog